Ann Druyan
type: MusicGroup
description: Ann Druyan ( ;In the revised edition of Cosmos: A Personal Voyage, Ann Druyan introduces herself in a . born June 13, 1949) is an American documentary producer and director specializing in the communi
popularity: 8
followers: 30
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x7ff829a4c463e80737cf970881a2e2170a43e0d925d87ec88c186b3d4702a53b
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954027
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954027
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/394acea3-8fb5-4cb4-a1ab-f8f9f4e6ac14.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/394acea3-8fb5-4cb4-a1ab-f8f9f4e6ac14.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/394acea3-8fb5-4cb4-a1ab-f8f9f4e6ac14
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T00:55:08Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x7ff829a4c463e80737cf970881a2e2170a43e0d925d87ec88c186b3d4702a53b","name":"Ann Druyan","registered_at":"2026-06-16T09:30:34Z","symbol":"NIM1009622","token_address":"0x3a2b38e43fd00725f55222286a8c5b0c4e222662","type":"artist","uuid":"394acea3-8fb5-4cb4-a1ab-f8f9f4e6ac14"}
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff829a4c463e80737cf970881a2e2170a43e0d925d87ec88c186b3d4702a53b. Chain 2 (Bitcoin): anchored in block 954027 (2026-06-17T00:55:08Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/394acea3-8fb5-4cb4-a1ab-f8f9f4e6ac14.json and https://artists.proofprofile.net/proofs/artist/394acea3-8fb5-4cb4-a1ab-f8f9f4e6ac14.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-17T00:55:08Z
  text: {"copyright_id":"0x7ff829a4c463e80737cf970881a2e2170a43e0d925d87ec88c186b3d4702a53b","name":"Ann Druyan","registered_at":"2026-06-16T09:30:34Z","symbol":"NIM1009622","token_address":"0x3a2b38e43fd00725f55222286a8c5b0c4e222662","type":"artist","uuid":"394acea3-8fb5-4cb4-a1ab-f8f9f4e6ac14"}